Ag9300 - Silvertel

Ag9300 - Silvertel
V1.6 January 2010
Datasheet
Silvertel
Ag9300
PoE Module for security Cameras and Systems
1 Features
Pb
 PSU Module for POE, 12Vdc and
24Vac
 POE input voltage 36Vdc to 57Vdc
DC input voltage
12Vdc to 48Vdc
AC input voltage
18Vac to 30Vac
 IEEE802.3af compliant
 Small Dual In-Line (DIL) package
size – 50.6mm (L) x 30mm (W)
 Overload and short-circuit
protection
 Adjustable Output
 Thermal Cut Off
 Single High efficiency DC/DC
converter
 1500Vdc isolation (input to output)
 Silvertel “design-in” assistance
2 Description
The Ag9300 Power-over-Ethernet (PoE) module is designed to extract power from a conventional
twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af PoE standard. With an
additional auxiliary input that will accept a DC or AC voltage.
This module is ideal for security cameras where 12Vdc or 24Vac is used. It can also be used with
other security systems such as door access or sensors that have an input voltage of 12Vdc to
48Vdc or 18Vac to 30Vac.
The Ag9300 signature and control circuit provides the PoE compatibility signature and power
classification required by the Power Sourcing Equipment (PSE) before applying up to 15W power
to the port. The Ag9300 is compatible with Class 0 to Class 3 equipment.
The high efficiency DC/DC converter operates over a wide input voltage range with a low ripple
and low noise output. The DC/DC converter also has built-in output overload, output short-circuit
and over-temperature protection and provides a 1500Vdc (input to output) isolation barrier.
© Silver Telecom 2011
Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
Table of Contents
1
2
Features .......................................................................................................................1
Description....................................................................................................................1
Table of Contents .............................................................................................................2
Table of Figures ...............................................................................................................2
3 Ag9300 Product Selector† ............................................................................................3
4 Pin Description .............................................................................................................4
5 Functional Description ..................................................................................................5
5.1
Inputs.....................................................................................................................5
5.2
PD Signature .........................................................................................................6
5.3
Isolation .................................................................................................................6
5.4
Power Classification ..............................................................................................6
5.5
DC/DC Converter ..................................................................................................7
5.6
Output Adjustment.................................................................................................7
5.7
Typical Connections ..............................................................................................9
6 Typical Application......................................................................................................10
7 Typical Recommendations .........................................................................................11
8 Operating Temperature Range...................................................................................11
9 Protection ...................................................................................................................12
10
Electrical Characteristics.........................................................................................13
10.1 Absolute Maximum Ratings*................................................................................13
10.2 Recommended Operating Conditions..................................................................13
10.3 DC Electrical Characteristics*..............................................................................13
11
Package ..................................................................................................................14
Table of Figures
Figure 1: Block Diagram with External Components............................................................3
Figure 2: Ag9300 DIL Package Format................................................................................4
Figure 3: Typical System Diagram.......................................................................................6
Figure 4: Class Programming Option...................................................................................7
Figure 5: Output Adjustment ................................................................................................8
Figure 6: Typical Connection Diagram.................................................................................9
Figure 7: Typical Application..............................................................................................10
Figure 8: Typical Layout.....................................................................................................11
Figure 9: Ag9300 Operating Profile ...................................................................................12
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
3 Ag9300 Product Selector†
Part Number
Ag9312-D
Nominal Output Voltage
12V
Maximum Output Power *
12 Watts
Marking
12
Package
DIL
*At 25°C with VIN = 48V
† The Ag9300 fully meets the requirements of the RoHS directive 2002/95/EC on the restriction of hazardous substances in electronic
equipment.
Table 1: Ordering Information
~
-
+
~
POE
Inputs
Ag9300
~
-
+
VIN+
+VDC
~
VINSignature
& Control
~
Auxiliary
Inputs
+
AUX+
-VDC
+
~
~
ADJ
AUX-
+
-
Figure 1: Block Diagram with External Components
© Silver Telecom 2011
DC
Output
CLASS
~
-
DC:DC
Converter
3
Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
4 Pin Description
Pin #
Name
1
AUX-
2
AUX+
3
VIN+
4
CP
5
VIN-
6
ADJ
7
-VDC
8
+VDC
Description
AUX Direct Input -. This pin connects to the negative (-) output
of an auxiliary DC power supply or AC supply via a rectifier.
AUX Direct Input +. This pin connects to the positive (+) output
of an auxiliary DC power supply or AC supply via a rectifier.
POE Direct Input +. This pin connects to the positive (+) output
of the POE input bridge rectifiers.
Class Programming. Connecting an external resistor to VIN- will
change the current class of the module. With no resistor fitted the
Ag9300 will default to Class 0.
POE Direct Input -. This pin connects to the negative (-) output
of the POE input bridge rectifiers.
Output Adjust. The output voltage can be adjusted from its
nominal value, by connecting an external resistor from this pin to
either the +VDC pin or the -VDC pin.
Negative DC Output. This pin provides the negative regulated
output from the DC/DC converter.
Positive DC Output. This pin provides the positive regulated
output from the DC/DC converter.
Figure 2: Ag9300 DIL Package Format
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
5 Functional Description
5.1 Inputs
The Ag9300 has two inputs: The VIN input is for POE and is connected to two external bridge rectifiers, see Figure 3.
This allows the Ag9300 to be compatible with equipment that use the different power
options (power on the Data Pair or power on the Spare Pair).
The AUX (auxiliary) input can be connected directly to a DC power supply. This input has
a wide input range of 12Vdc to 48Vdc and has internal polarity protection, see Figure 1.
The input can also be connected to an AC power supply in the range of 18Vac to 30Vac
via a bridge rectifier and smoothing capacitor (recommended 470μF).
If power is applied to both the VIN and AUX inputs, then the highest voltage will take
priority. For example if a PSE (Power Sourcing Equipment) is supplying 48V to the VIN
input and a 12Vdc supply is connected to the AUX input, the current will be drawn from the
PSE.
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
POWER SOURCING EQUIPMENT (PSE)
POWERED DEVICE (PD)
1
1
2
2
RX
Data Pair
3
3
Ag9300
~
-
+
VIN+
~
TX
6
+VDC
6
4
4
5
5
DC
OUTPUTS
VIN-VDC
~
-
Spare Pair
7
7
8
8
CLASS
+
ADJ
~
~
~
-
+
470µF
~
+
~
Auxiliary Input
AUX+
AUX-
+
-
Figure 3: Typical System Diagram
5.2 PD Signature
When the Ag9300 VIN input is connected to the Cat 5e cable, it will automatically present
a Powered Device (PD) signature to the PSE, when requested. The PSE will recognise
that a PD is connected to that line and supply power.
5.3 Isolation
To meet the safety isolation requirements of IEEE802.3af section 33.4.1 a PD must pass
the electrical strength test of IEC 60950 sub clause 6.2. This calls for either a) 1500Vac
test or b) 1500Vdc impulse test. The Ag9300 is specified to meet the 1500Vdc impulse
test. It is also important that the tracks on either side of the isolation barrier have at least a
3mm clearance, see Figure 8 for more information.
5.4 Power Classification
This is optional from the PSE and is used for power management. The Ag9300 VIN input
allows the current class to be externally programmed by connecting a resistor between the
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
CLASS and VIN- pins, see Figure 4. If no resistor is fitted the Ag9300 will default to Class
0, a full list of programming resistor values are shown in Table 2.
CLASS
0
1
2
3
4
Programming
Resistance (Ohms)
Do not fit
698 ±1%
383 ±1%
249 ±1%
TBD
Min Power
(W)
0.44
0.44
3.84
6.49
Reserved
Max Power
(W)
12.95
3.84
6.49
12.95
Reserved
Table 2: Class Programming
Ag9300
VINRC
CLASS
Class Programming
option
Figure 4: Class Programming Option
5.5 DC/DC Converter
The Ag9300’s DC/DC converter provides a regulated 12V (nominal) output with low ripple
and low noise. The DC/DC converter also has built-in output overload and short-circuit
protection. The Ag9300 also has thermal protection; which will shutdown the DC/DC
converter if triggered.
5.6 Output Adjustment
The Ag9300 has an ADJ pin, which allows the output voltage to be increased or decreased
from its nominal value.
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
Figure 5: Output Adjustment shows how the ADJ pin is connected: -
Ag9300
Ag9300
+VDC
+VDC
RA
ADJ
ADJ
RA
-VDC
-VDC
Reducing the output
voltage from nominal
Increasing the output
voltage from nominal
Figure 5: Output Adjustment
Reducing the output voltage, connect RA between ADJ and +VDC
Value of RA
Ag9300 output
Open Circuit
12.0V
75K Ohms
10.46V
Increasing the output voltage, connect RA between ADJ and GND
Value of RA
Ag9300 output
Open Circuit
12.0V
0 Ohms
13.4V
Table 3: Output Adjustment Resistor (R) Value
*Note: the Ag9300 maximum load current is 1A.
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
5.7 Typical Connections
The Ag9300 only requires a few external components - the bridge rectifiers on the VIN
input are to conform to the IEEE802.3af input polarity protection requirement. The 470µF
capacitor (C2) connected across the output is needed for stability and to cope with load
step changes. This can be a low cost electrolytic capacitor (a minimum of 470µF 16V is
recommended) as shown in Figure 6, this does not need to be a low ESR type for
operation in temperatures down to 0C. If ambient temperature is likely to go below 0C
then we would recommend a low ESR electrolytic capacitor.
The Class programming resistor RC is optional and provides great flexibility to the Ag9300.
Further information on using this input can be found in section Power Classification.
The output voltage can be adjusted by simply connecting a resistor between the ADJ pin
and either the +VDC Pin or the –VDC pin, see section 5.6 Output Adjustment.
Figure 6: Typical Connection Diagram
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
Figure 6 shows two auxiliary inputs - The AC input requires an external bridge rectifier and
470µF capacitor, the DC input does not require these components. It would be acceptable
to inject DC into the AC input, if polarity protection is required, but the voltage drop of the
bridge rectifier will need to be taken into account. Using Schottky diodes in the bridge
rectifiers will reduce the voltage drop and increase the overall efficiency figures.
6 Typical Application
The Ag9300 can be used in numerous applications. In the example shown in Figure 7, the
data outputs from the switch are connected to the inputs of a midspan. The midspan will
then add power (to the data) on each output that supports POE.
In this example port 1 is connected to an ethernet camera and port 2 is connected to a
wireless access point, both of these devices have a built-in Ag9300. When the midspan is
switched on (or when the device is connected), the midspan will check each output for a
POE signature. On ports 1 and 2 the Ag9300 will identify themselves as POE enabled
devices and the midspan will supply both data and power to these peripherals.
The other ports (shown in this example) will not have a PoE signature and the midspan will
only pass the data through to these peripherals. The midspan will continuously monitor
each output to see if a POE enabled device has been added or removed.
8
1
Switch
Patch Cables
8
1 Midspan Equipment
Ethernet
Camera
Door Access
PC's and other non
PoE peripherals
Figure 7: Typical Application
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
7 Typical Recommendations
Figure 8: Typical Layout gives an example of the tracking needed for the Ag9300. R1, R2
and R3 are optional components. C2 needs to be positioned close to the output pins of the
Ag9300 as possible to minimise the current loop. The thermal performance of the Ag9300
can be improved by increasing the surface area of the output tracks (+VDC and -VDC).
This is not applicable if the Ag9300 is in a socket.
4mm
7mm
4mm
VIN-
Keep out area
1
AUXAUX+
VIN+
RC
C1
RA1
12V
Output
RA2
4mm
Isolation Barrier
Figure 8: Typical Layout
8 Operating Temperature Range
Because the Ag9300 is a power component, it will generate heat, so it is important that this
be taken into consideration at the design stage.
The heart of the Ag9300 is a DC/DC converter, which like any other power supply will
generate heat. The amount of heat generated by the module will depend on the load it is
required to drive and the input voltage supplied by the PSE. The information shown within
this section of datasheet is referenced to a nominal 48Vdc input voltage supplied by the
PSE.
The Ag9300 has a maximum ambient operating temperature of 70°C see Figure 9. These
results are in still air without any heatsinking, the performance of the Ag9300 can be
improved by forcing the airflow over the part or by using a heatsink (see the Ag9300
application note on heatsinking for more information).
Because each application is different it is impossible to give fixed and absolute thermal
recommendations. However it is important that any enclosure used has sufficient
ventilation for the Ag9300 and a direct airflow if possible.
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
When intended for used in ambient temperatures below 0C the we would recommend a
low ESR electrolytic capacitor be used on the DC output.
Output Power (W)
Figure 9 show the maximum ambient temperature under different load conditions. These
figure have been recorded in a sealed enclosure (in still air) using a heater element to
elevate the ambient temperature (within the enclosure).
Figure 9: Ag9300 Operating Profile
9 Protection
The Ag9300 has built-in over-current and thermal protection to prevent the module from
being damaged if operated beyond its power / temperature specification. If a short circuit is
applied to the output the DC/DC converter will limit the current until the short circuit is
removed. The thermal protection circuit will continue to disable the DC/DC converter until
the Ag9300 temperature has cooled sufficiently.
The Ag9300 may be damaged by input voltage transients greater than 80V. If protection
from electrostatic discharge (ESD) or other high voltage transients is required, it is
recommended that over-voltage clamping devices are fitted across the VIN and AUX
inputs. Typically an SMAJ58 will be sufficient; see Apps Note “ANX-POE-Protection”.
© Silver Telecom 2011
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Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
10 Electrical Characteristics
10.1 Absolute Maximum Ratings*
Parameter
1
DC Supply Voltage
2
DC Supply Voltage Surge for 1ms
3
Storage Temperature
Symbol
Min
Max
Units
VCC
-0.3
60
V
VSURGE
-0.6
80
V
TS
-40
+100
°
C
*Exceeding the above ratings may cause permanent damage to the product. Functional operation under these conditions is not implied.
Maximum ratings assume free airflow.
10.2 Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Units
48
57
V
1
POE Input Supply Voltage
VINPOE
36
2
AUX Input Supply Voltage
VINAUX
10.8
18
50
40
Vdc
Vac
3
POE Input Under Voltage Lockout
VLOCK
30
36
V
4
Operating Temperature
TOP
-20
70†
Ta / °C
25
†See Section Operating Temperature Range
10.3 DC Electrical Characteristics*
1
2
3
4
5
DC Characteristic
Sym
Min
Typ*
Max
Units
Nominal Output Voltage
VOUT
11.5
12
12.5
V
1.0
A
0.7
A
Output Current (VIN = 48V or
VAUX = 16Vdc)
Output Current(VAUX = 12Vdc)
Line Regulation VIN = 36V to
57V @ max load**
Load Regulation min to max
load (VIN = 48V)**
Output Ripple and Noise Max
load †
IOUT
VLINE
0.1
%
VLOAD
1
%
VRN
50
mVp-p
RLOAD
100
mA
6
Minimum Load
7
Short-Circuit Duration
TSC
8
Efficiency @ 100% Load,
VIN=48V
EFF
9
Isolation Voltage (I/O)
VISO
∞
82
13
for specified
regulation ‡
Continuous @
50 °C, VIN=48V
%
1500
*Typical figures are at 25°C with a nominal 48V supply and are for design aid only. Not Guaranteed
**After 5 minutes
†The output ripple and noise can be reduced with an external filter, see application note.
‡Can be used with no load at reduced voltage regulation.
© Silver Telecom 2011
sec
Test
Comments
VPK
Impulse Test
Ag9300
V1.6 January 2010
Data Sheet
POE Module for Security Cameras and Systems
11 Package
50.60
15.0
45.72
1
2.54
TYP
2.44
5
30.0
8
3
2.54
1.6
11.5
MAX
6
0.6
(Recommended PCB hole diameter = 1.1 ± 0.05)
Dimensions (in mm) are nominal unless otherwise stated
Information published in this datasheet is believed to be correct and accurate. Silver Telecom assumes no liability for errors which may
occur or for liability otherwise arising out of use of this information or infringement of patents which may occur as a result of such use.
No license is granted by this document under patents owned by Silver Telecom or licensed from third parties by Silver Telecom. The
products, their specification and information appearing in this document are subject to change by Silver Telecom without notice.
© Silver Telecom 2011
14
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